Sharpen bitmap using Convolution

The previous exercise " Blur bitmap using Convolution ". By changing the matrix of Convolution class, we can use it to sharpen bit...

Blur bitmap using Convolution

The previous exercise blur bitmap by averaging pixels with surrounding pixels . In this exercise, we are going to implement a class of Convo...

Blur bitmap

This exercise generate a blur bitmap by changing each pixel to the average of its surrounding 5x5 pixel. package com.example.androiddrawbitm...

Example to apply BlurMaskFilter on Bitmap

package com.example.androiddrawbitmap; import java.io.FileNotFoundException; import android.net.Uri; import android.os.Bundle; import androi...

Convert Bitmap to gray-scale with ColorMatrix

To convert Bitmap to gray-scale, we can apply ColorMatrix with the following matrix: //Array to generate Gray-Scale image float[] Gray...

ColorMatrix.setConcat() to combine ColorMatrixes

The exercise " Set the rotation on a color axis of Bitmap with ColorMatrix " create rotated ColorMatrix for one color only, not al...

Scale color and alpha of colormatrix with setScale()

Example of using ColorMatrix.setScale(float rScale, float gScale, float bScale, float aScale). package com.example.androiddrawbitmap; import...

Set the rotation on a color axis of Bitmap with ColorMatrix

Example to set the rotation on a color axis by the specified values. axis=0 correspond to a rotation around the RED color axis=1 correspond ...

Adjust saturation of Bitmap with ColorMatrix

android.graphics.ColorMatrix is a 5x4 matrix for transforming the color+alpha components of a Bitmap. The setSaturation(float sat) method of...

Scale bitmap with inDither and inPreferQualityOverSpeed

The exercise " Load scaled bitmap " demonstrate a simple and standard method to scale bitmap. Additionally, we can set inDither an...

Adjust HSV(Hue, Saturation and Value) of bitmap

android.graphics.Color class provide colorToHSV() and HSVToColor() methods to convert between ARGB color and HSV components. Such that we ca...